Quarterly report pursuant to Section 13 or 15(d)

EARNINGS PER SHARE - Basic and Diluted Earnings per Share (Details)

v3.5.0.2
EARNINGS PER SHARE - Basic and Diluted Earnings per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Numerator        
Net income (loss) $ 7,944 $ 2,109 $ 18,791 $ (569)
Net (income) loss attributable to noncontrolling interests (7,955) 2,263 (9,222) 8,405
Net (loss) income attributable to National Storage Affiliates Trust (11) 4,372 9,569 7,836
Distributed and undistributed earnings allocated to participating securities (4) (3) (13) (6)
Net (loss) income attributable to common shareholders - basic (15) 4,369 9,556 7,830
Effect of assumed conversion of dilutive securities 0 (2,275) 9,135 (5,646)
Net (loss) income attributable to common shareholders - diluted $ (15) $ 2,094 $ 18,691 $ 2,184
Denominator        
Weighted average shares outstanding - basic (in shares) 35,080 23,000 27,084 12,924
Effect of dilutive securities:        
Weighted average shares outstanding - diluted (in shares) 35,080 63,456 75,492 38,758
Earnings (loss) per share - basic (in dollars per share) $ 0.00 $ 0.19 $ 0.35 $ 0.61
Earnings (loss) per share - diluted (in dollars per share) $ 0.00 $ 0.03 $ 0.25 $ 0.06
OP units [Member] | NSA OP, LP [Member]        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 0 21,109 23,761 13,773
OP units [Member] | DownREIT Partnership [Member]        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 0 1,432 1,835 949
LTIP units [Member] | NSA OP, LP [Member]        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 0 1,844 2,162 1,030
Subordinated performance units [Member] | NSA OP, LP And DownREIT Partnership [Member]        
Effect of dilutive securities:        
Effect of dilutive securities (in shares) 0 16,071 20,650 10,082